Follow the on screen instructions to jailbreak your device. I recommend only ticking "Install Cydia" to reduce the probability of errors.

To boot into DFU(Device Firmware Update) mode:
- Press Power Button for 3 seconds
- Hold Power button and Home button simultaneously for 10 seconds
- Release Power button but keep holding Home button until the jailbreaking process starts.

Redsn0w will then install the required files for your iDevice and voilà, congratulations, you have just jailbroken your iDevice.